Sanka’s Weekly Challenge – AM or PM?

How do race officials avoid a mix up between times before noon and times after noon? In civiliam time, an AM or PM is added to the time. During the race, times are reported using the 24-hour clock known as Military time. Briefly, 12:00 AM or midnight is written as 0000 hours. 1:00 AM is written as 0100. If a musher arrived in a checkpoint at 12:30 AM the time would be recorded as 0030. If a musher arrived at 1:15 am, the time would be written as 0115. This all goes along very nicely up to noon. With Military time, a musher arriving at a checkpoint at 12:00 PM, would be recorded as arriving at 1200 hours. No need to use PM. If a musher arrived at 12:30 PM the time would be recorded as 1230. When it gets to be 1:00 PM, the time is recorded as 1300. This conversion is very easy. Simply add the number of hours beyond noon to 12. So 1:00 PM is 1300, 2:00 PM is 1400, 11:00 PM is 2300 hours. A musher arriving at 11:52 PM would be recorded as 2352.

Your 1st challenge, make a chart using the civilian time and military time for the 24 hours in a day. Remember that 12:00 AM is 0000 in Military time. When you pass noon, 1:00 PM would be recorded as 1300 in Military time.

Your 2nd challenge, make a similar chart using the half hour. You’d begin with 12:30 AM and record it as 0030 in Military time. When you pass noon, 1:30 PM would be recorded as 1330 in Military time.